/Engine/Source/Runtime/HeadMountedDisplay/Public/IXRLoadingScreen.h
Internal utility method for implementing backwards compatibility with IStereoLayers::Show/HideSplashScreen. Should be called from implementations overriding IStereoLayer::UpdateSplashScreen()
static void ShowLoadingScreen_Compat ( bool bShow, FTexture2DRHIRef Texture, const FVector & Offset, const FVector2D & Scale )